#include <REGX52.H>
#include "Delay.h"
sbit BEEP=P2^5;
void main(void)
{
	while(1)
	{
    	BEEP=~BEEP;
		Delay(500);	
		BEEP=~BEEP;
		Delay(300);	
		BEEP=~BEEP;
		Delay(800);
    	BEEP=~BEEP;
	    Delay(600);			
	}
}
